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Shot timer app

I have had decent luck with Make Ready. Its free and has the ability for a random time delay and then a starting beep which a few others I have tried lacked. It also says it'll pick up multiple shots but I haven't had much luck with that being consistent
 
I use to use IPSC shot timer but then I got a real timer so I'm not sure if it's still there. The IPSC shot timer app worked well and you can even change the settings so it could pick up the hammer droping on an empty chamber for dry fire.